/// <summary>Initializes a new instance of the <see cref="DrawingConnection"/> class.
/// Initializes a new instance of the class.</summary>
/// <param name="model">Model connection.</param>
public DrawingConnection(ModelConnection model)
{
this.model = model;
}
/// <summary>
/// Initializes a new instance of the <see cref="Connection"/> class.
/// Initializes a new instance of the class.
/// </summary>
public Connection()
{
this.model = new ModelConnection();
this.drawing = new DrawingConnection(this.model);
}